Routing Messages Between Applications

1. A method comprising: authenticating, by a message routing system, an entity having an account with an application service provider; generating, by the message routing system, an authentication token for the entity, the authentication token indicating authentication of the entity by the message routing system; receiving, by the message routing system, a selection of the application service provider from a directory that includes a plurality of application service providers accessible via the message routing system; responsive to receiving the selection, transmitting, by the message routing system, the authentication token to the application service provider; directing, by the message routing system, the entity to the application service provider; and responsive to transmitting the authentication token to the application service provider, directing the entity to the application service provider, and the entity providing authentication credentials associated with the account to the applications service provider as part of associating the authentication token with the account, receiving, by the message routing system from the application service provider, a message indicating that the application service provider accepts the authentication token, the authentication token accepted by the application service provider as a substitute for the authentication credentials associated with the account.

2. The method of claim 1 , further comprising: expiring the authentication token in response to not receiving the message within a set time period after initiating the generation of the authentication token.

3. The method of claim 1 , further comprising: maintaining, by the message routing system, a mapping between the authentication token and the account; receiving, by the message routing system from the entity, an additional message that includes the authentication token; and transmitting, by the message routing system, the additional message to the application service provider, the additional message including an identifier associated with the account, the identifier identified based on the mapping.

4. The method of claim 1 , wherein the application service provider maintains a mapping between the authentication token and the account.

5. The method of claim 1 , wherein the authentication token is an eight byte hex number.

6. The method of claim 1 , further comprising: receiving, by the message routing system, an additional message destined for the application service provider and including the authentication token; authenticating, by the message routing system, the additional message based on the authentication token; and transmitting, by the message routing system, the additional message to the application service provider, the application service provider authenticating the additional message in association with account based on the authentication token.

7. A method comprising: authenticating, by a message routing system, an entity having an account with an application service provider; generating, by the message routing system, an authentication token for the entity, the authentication token indicating authentication of the entity by the message routing system; transmitting, by the message routing system, the authentication token to the application service provider; receiving, by the message routing system, a first message indicating that the application service provider accepts the authentication token, the authentication token accepted by the application service provider as a substitute for the authentication credentials associated with the account; receiving, by the message routing system, a second message destined for the application service provider and including the authentication token; authenticating, by the message routing system, the second message based on the authentication token; and transmitting, by the message routing system, the second message to the application service provider, the application service provider authenticating the second message in association with the account based on the authentication token.

8. The method of claim 7 , wherein the authentication token is an eight byte hex number.

9. The method of claim 7 , further comprising: expiring the authentication token in response to not receiving the message within a set time period after initiating the generation of the authentication token.

10. The method of claim 7 , further comprising: maintaining, by the message routing system, a mapping between the authentication token and the account; receiving, by the message routing system from the entity, an additional message that includes the authentication token; and transmitting, by the message routing system, the additional message to the application service provider, the additional message including an identifier associated with the account, the identifier identified based on the mapping.

11. The method of claim 7 , wherein the application service provider maintains a mapping between the authentication token and the account.

12. A computer program product comprising a non-transitory computer-readable storage medium containing computer program instructions which when executed by one or more processors cause the one or more processors to perform operations comprising: authenticating, by a message routing system, an entity having an account with an application service provider; generating, by the message routing system, an authentication token for the entity, the authentication token indicating authentication of the entity by the message routing system; receiving, by the message routing system, a selection of the application service provider from a directory that includes a plurality of application service providers accessible via the message routing system; responsive to receiving the selection, transmitting, by the message routing system, the authentication token to the application service provider; and responsive to the entity providing authentication credentials associated with the account to the applications service provider, receiving, by the message routing system, a message indicating that the application service provider accepts the authentication token, the authentication token accepted by the application service provider as a substitute for the authentication credentials associated with the account.

13. The computer program product of claim 12 , wherein the computer program instructions are further for: expiring the authentication token in response to not receiving the message within a set time period after initiating the generation of the authentication token.

14. The computer program product of claim 12 , wherein the computer program instructions are further for: maintaining, by the message routing system, a mapping between the authentication token and the account; receiving, by the message routing system from the entity, an additional message that includes the authentication token; and transmitting, by the message routing system, the additional message to the application service provider, the additional message including an identifier associated with the account, the identifier identified based on the mapping.

15. The computer program product of claim 12 , wherein the application service provider maintains a mapping between the authentication token and the account.

16. The computer program product of claim 12 , wherein the computer program instructions are further for: receiving, by the message routing system, an additional message destined for the application service provider and including the authentication token; authenticating, by the message routing system, the message based on the authentication token; and transmitting, by the message routing system, the additional message to the application service provider, the application service provider authenticating the additional message in association with account based on the authentication token.

17. The computer program product of claim 12 , wherein the authentication token is an eight byte hex number.

18. A computer program product comprising a non-transitory computer-readable storage medium containing computer program instructions which when executed by one or more processors cause the one or more processors to perform operations comprising: authenticating, by a message routing system, an entity having an account with an application service provider; generating, by the message routing system, an authentication token for the entity, the authentication token indicating authentication of the entity by the message routing system; receiving, by the message routing system, a selection of the application service provider from a directory that includes a plurality of application service providers accessible via the message routing system; and responsive to receiving the selection, transmitting, by the message routing system, the authentication token to the application service provider; directing, by the message routing system, the entity to the application service provider; and responsive to transmitting the authentication token to the application service provider, directing the entity to the application service provider, and the entity providing authentication credentials associated with the account to the applications service provider as part of associating the authentication token with the account, receiving, by the message routing system from the application service provider, a message indicating that the application service provider accepts the authentication token, the authentication token accepted by the application service provider as a substitute for the authentication credentials associated with the account.

19. The computer program product of claim 18 , wherein the computer program instructions are further for: expiring the authentication token in response to not receiving the message within a set time period after initiating the generation of the authentication token.

20. The computer program product of claim 18 , wherein the computer program instructions are further for: maintaining, by the message routing system, a mapping between the authentication token and the account; receiving, by the message routing system from the entity, an additional message that includes the authentication token; and transmitting, by the message routing system, the additional message to the application service provider, the additional message including an identifier associated with the account, the identifier identified based on the mapping.